我尝试使用 gradle 插件编译 protobuf 文件,但出现以下错误:
java.io.IOException: Can't write [/Users/elavi/dev/sdk3/android/showcaseapp/build/intermediates/multi-dex/debug/componentClasses.jar]
(Can't read [/Users/elavi/.gradle/caches/modules-2/files-2.1/com.google.protobuf/protobuf-java/3.0.0/6d325aa7c921661d84577c0a93d82da4df9fa4c8/protobuf-java-3.0.0.jar(;;;;;;**.class)]
(Duplicate zip entry [protobuf-java-3.0.0.jar:com/google/protobuf/ExperimentalApi.class]))
不知道为什么会发生这种情况... 正如预期的那样,protobuf 文件正确生成,但最后一步因这个奇怪的错误而失败。
这是我的 gradle 文件:
apply plugin: 'com.android.library'
apply plugin: 'com.google.protobuf'
apply plugin: 'idea'
group = GROUP
version = VERSION_NAME
apply from: 'versioning.gradle'
buildscript {
repositories {
mavenCentral()
}
}
android {
compileSdkVersion 26
buildToolsVersion '26.0.2'
flavorDimensions "default"
defaultConfig {
minSdkVersion 15
targetSdkVersion 26
versionCode buildVersionCode()
versionName VERSION_NAME
consumerProguardFiles 'tangram-proguard-rules.txt'
}
// Add proto files location to be used with the protobuf plugin
sourceSets {
main {
proto {
srcDir '../../common/vendored/proto'
}
}
}
}
dependencies {
compile 'com.google.protobuf:protobuf-lite:3.0.0'
compile 'io.grpc:grpc-stub:1.6.1'
compile 'io.grpc:grpc-protobuf:1.0.0-pre2'
compile 'javax.annotation:javax.annotation-api:1.2'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.android.support:support-annotations:27.0.0'
implementation project(':core')
}
// Protobuf configuration. Taken from the documentation: https://github.com/google/protobuf-gradle-plugin
protobuf {
protoc {
artifact = 'com.google.protobuf:protoc:3.0.0' } plugins {
javalite {
artifact = 'com.google.protobuf:protoc-gen-javalite:3.0.0'
}
grpc {
artifact = 'io.grpc:protoc-gen-grpc-java:1.0.0-pre2'
} } generateProtoTasks {
all().each { task ->
task.builtins {
remove java
}
task.plugins {
javalite { }
grpc {
option 'lite'
}
}
} } generatedFilesBaseDir = "$projectDir/build/gen" }
clean { delete protobuf.generatedFilesBaseDir }
idea { module {
sourceDirs += file("${protobuf.generatedFilesBaseDir}/main/java");
sourceDirs += file("${protobuf.generatedFilesBaseDir}/main/grpc"); } }
//apply from: file('gradle-mvn-push.gradle')
我只是添加了 protobuf 自述文件( https://github.com/google/protobuf-gradle-plugin )中写的内容,没有做任何花哨的事情......
最佳答案
也许您应该删除依赖项部分上的 compile 'com.google.protobuf:protobuf-lite:3.0.0'
条目,而且您还有重复的条目,并且缺少最新版本的一些配置。对于另一方来说,原型(prototype)源的路径可能有问题,我的原型(prototype)是 src/main/proto
但我只单独声明了 proto
。接下来是我的简要配置:
应用build.gradle
:
apply plugin: 'com.google.protobuf'
android {
...
sourceSets {
main {
proto {
}
}
}
...
configurations.all {
resolutionStrategy.force 'com.google.code.findbugs:jsr305:1.3.9'
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'io.grpc:grpc-okhttp:1.10.0'
implementation 'io.grpc:grpc-protobuf-lite:1.10.0'
implementation 'io.grpc:grpc-stub:1.10.0'
implementation 'javax.annotation:javax.annotation-api:1.2'
// full protobuf (optional)
// protobuf 'com.google.protobuf:protobuf-java:3.4.0'
...
}
protobuf {
protoc {
artifact = "com.google.protobuf:protoc:3.0.2"
}
plugins {
grpc {
artifact = 'io.grpc:protoc-gen-grpc-java:1.1.2'
}
javalite {
artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
}
}
generateProtoTasks {
all().each { task ->
task.plugins {
javalite {}
grpc {
// Options added to --grpc_out
option 'lite'
}
}
}
}
generatedFilesBaseDir = "$projectDir/build/generated"
}
主项目build.gradle
:
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.0'
classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.2"
...
}
}
关于android-gradle-plugin - protobuf gradle 插件无法编译,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47332613/